<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表排序</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyword">
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原顺序</button>
        <ul>
            <li v-for="(per,index) in filPerson" :key="per.id">
                {{per.name}}-{{per.age}}-{{per.sex}}
            </li>
        </ul>
    </div>
</body>

<script>
    new Vue({
        el:'#root',
        data:{
            keyword:'',
            sortType:0,
            person:[
              {id:'001',name:'马冬梅',age:18,sex:'女'},
              {id:'002',name:'周冬雨',age:19,sex:'女'},
              {id:'003',name:'周杰伦',age:20,sex:'男'},
              {id:'004',name:'温兆伦',age:17,sex:'男'},
            ],
        },
        computed:{
            filPerson(){
                const arr=this.filPerson=this.person.filter((p)=>{
                    return p.name.indexOf(this.keyword)  !== -1
                })
                //判断一下是否需要排序
                if(this.sortType){
                    arr.sort((p1,p2)=>{
                        return this.sortType===1? p2.age-p1.age:p1.age-p2.age
                    })
                }
                return arr
            }
        }
    })
</script>

</html>